1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "rail_map.h"

     7

#include "road_map.h"

     8

#include "table/sprites.h"

     9

#include "table/strings.h"

    10

#include "functions.h"

    11

#include "map.h"

    12

#include "tile.h"

    13

#include "town_map.h"

    14

#include "vehicle.h"

    15

#include "viewport.h"

    16

#include "command.h"

    17

#include "player.h"

    18

#include "town.h"

    19

#include "gfx.h"

    20

#include "sound.h"

    21

#include "yapf/yapf.h"

    22

#include "depot.h"

    23

    24

void RoadVehEnterDepot(Vehicle *v);

    25

    26

    27

static uint CountRoadBits(RoadBits r)

    28

{

    29

	uint count = 0;

    30

    31

	if (r & ROAD_NW) ++count;

    32

	if (r & ROAD_SW) ++count;

    33

	if (r & ROAD_SE) ++count;

    34

	if (r & ROAD_NE) ++count;

    35

	return count;

    36

}

    37

    38

    39

static bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, bool* edge_road)

    40

{

    41

	RoadBits present;

    42

	RoadBits n;

    43

	byte owner;

    44

	*edge_road = true;

    45

    46

	if (_game_mode == GM_EDITOR) return true;

    47

    48

	// Only do the special processing for actual players.

    49

	if (_current_player >= MAX_PLAYERS) return true;

    50

    51

	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);

    52

    53

	// Only do the special processing if the road is owned

    54

	// by a town

    55

	if (owner != OWNER_TOWN) {

    56

		return owner == OWNER_NONE || CheckOwnership(owner);

    57

	}

    58

    59

	if (_cheats.magic_bulldozer.value) return true;

    60

    61

	// Get a bitmask of which neighbouring roads has a tile

    62

	n = 0;

    63

	present = GetAnyRoadBits(tile);

    64

	if (present & ROAD_NE && GetAnyRoadBits(TILE_ADDXY(tile,-1, 0)) & ROAD_SW) n |= ROAD_NE;

    65

	if (present & ROAD_SE && GetAnyRoadBits(TILE_ADDXY(tile, 0, 1)) & ROAD_NW) n |= ROAD_SE;

    66

	if (present & ROAD_SW && GetAnyRoadBits(TILE_ADDXY(tile, 1, 0)) & ROAD_NE) n |= ROAD_SW;

    67

	if (present & ROAD_NW && GetAnyRoadBits(TILE_ADDXY(tile, 0,-1)) & ROAD_SE) n |= ROAD_NW;

    68

    69

	// If 0 or 1 bits are set in n, or if no bits that match the bits to remove,

    70

	// then allow it

    71

	if ((n & (n - 1)) != 0 && (n & remove) != 0) {

    72

		Town *t;

    73

		*edge_road = false;

    74

		// you can remove all kind of roads with extra dynamite

    75

		if (_patches.extra_dynamite) return true;

    76

    77

		t = ClosestTownFromTile(tile, _patches.dist_local_authority);

    78

    79

		SetDParam(0, t->index);

    80

		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

    81

		return false;

    82

	}

    83

    84

	return true;

    85

}

    86

    87

    88

/** Delete a piece of road.

    89

 * @param tile tile where to remove road from

    90

 * @param p1 road piece flags

    91

 * @param p2 unused

    92

 */

    93

int32 CmdRemoveRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

    94

{

    95

	// cost for removing inner/edge -roads

    96

	static const uint16 road_remove_cost[2] = {50, 18};

    97

    98

	PlayerID owner;

    99

	Town *t;

   100

	/* true if the roadpiece was always removeable,

   101

	 * false if it was a center piece. Affects town ratings drop */

   102

	bool edge_road;

   103

	RoadBits pieces;

   104

   105

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   106

   107

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) */

   108

	if (p1 >> 4) return CMD_ERROR;

   109

	pieces = p1;

   110

   112

   113

	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);

   114

   115

	if (owner == OWNER_TOWN && _game_mode != GM_EDITOR) {

   121

	} else {

   122

		t = NULL;

   123

	}

   124

   125

	if (!CheckAllowRemoveRoad(tile, pieces, &edge_road)) return CMD_ERROR;

   126

   130

   136

				return CMD_ERROR;

   137

			}

   138

   139

			if (flags & DC_EXEC) {

   140

				ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   142

				MarkTileDirtyByTile(tile);

   143

			}

   144

			return _price.remove_road * 2;

   145

   202

	}

   203

}

   204

   205

   206

static const RoadBits _valid_tileh_slopes_road[][15] = {

   207

	// set of normal ones

   208

	{

   209

		ROAD_ALL, 0, 0,

   210

		ROAD_X,   0, 0,  // 3, 4, 5

   211

		ROAD_Y,   0, 0,

   212

		ROAD_Y,   0, 0,  // 9, 10, 11

   213

		ROAD_X,   0, 0

   214

	},

   215

	// allowed road for an evenly raised platform

   216

	{

   217

		0,

   218

		ROAD_SW | ROAD_NW,

   219

		ROAD_SW | ROAD_SE,

   220

		ROAD_Y  | ROAD_SW,

   221

   222

		ROAD_SE | ROAD_NE, // 4

   223

		ROAD_ALL,

   224

		ROAD_X  | ROAD_SE,

   225

		ROAD_ALL,

   226

   227

		ROAD_NW | ROAD_NE, // 8

   228

		ROAD_X  | ROAD_NW,

   229

		ROAD_ALL,

   230

		ROAD_ALL,

   231

   232

		ROAD_Y  | ROAD_NE, // 12

   233

		ROAD_ALL,

   234

		ROAD_ALL

   235

	},

   236

};

   237

   238

   239

static uint32 CheckRoadSlope(Slope tileh, RoadBits* pieces, RoadBits existing)

   240

{

   241

	RoadBits road_bits;

   242

   243

	if (IsSteepSlope(tileh)) return CMD_ERROR;

   244

	road_bits = *pieces | existing;

   245

   246

	// no special foundation

   247

	if ((~_valid_tileh_slopes_road[0][tileh] & road_bits) == 0) {

   248

		// force that all bits are set when we have slopes

   249

		if (tileh != SLOPE_FLAT) *pieces |= _valid_tileh_slopes_road[0][tileh];

   250

		return 0; // no extra cost

   251

	}

   252

   253

	// foundation is used. Whole tile is leveled up

   254

	if ((~_valid_tileh_slopes_road[1][tileh] & road_bits) == 0) {

   255

		return existing ? 0 : _price.terraform;

   256

	}

   257

   258

	// partly leveled up tile, only if there's no road on that tile

   259

	if (existing == 0 && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)) {

   260

		// force full pieces.

   261

		*pieces |= (*pieces & 0xC) >> 2;

   262

		*pieces |= (*pieces & 0x3) << 2;

   263

		if (*pieces == ROAD_X || *pieces == ROAD_Y) return _price.terraform;

   264

	}

   265

	return CMD_ERROR;

   266

}

   267

   268

/** Build a piece of road.

   269

 * @param tile tile where to build road

   270

 * @param p1 road piece flags

   271

 * @param p2 the town that is building the road (0 if not applicable)

   272

 */

   273

int32 CmdBuildRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   274

{

   275

	int32 cost = 0;

   276

	int32 ret;

   277

	RoadBits existing = 0;

   278

	RoadBits pieces;

   279

	Slope tileh;

   280

   281

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   282

   283

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero

   284

	 * if a non-player is building the road */

   285

	if ((p1 >> 4) || (_current_player < MAX_PLAYERS && p2 != 0) || !IsTownIndex(p2)) return CMD_ERROR;

   286

	pieces = p1;

   287

   288

	tileh = GetTileSlope(tile, NULL);

   289

   290

	switch (GetTileType(tile)) {

   291

		case MP_STREET:

   292

			switch (GetRoadTileType(tile)) {

   293

				case ROAD_TILE_NORMAL:

   294

					existing = GetRoadBits(tile);

   295

					if ((existing & pieces) == pieces) {

   296

						return_cmd_error(STR_1007_ALREADY_BUILT);

   297

					}

   298

					if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   299

					break;

   300

   301

				case ROAD_TILE_CROSSING:

   302

					if (pieces != GetCrossingRoadBits(tile)) { // XXX is this correct?

   303

						return_cmd_error(STR_1007_ALREADY_BUILT);

   304

					}

   305

					goto do_clear;

   306

   307

				default:

   308

				case ROAD_TILE_DEPOT:

   309

					goto do_clear;

   310

			}

   311

			break;

   312

   313

		case MP_RAILWAY: {

   314

			Axis roaddir;

   315

   316

			if (IsSteepSlope(tileh)) {

   317

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   318

			}

   319

   320

#define M(x) (1 << (x))

   321

			/* Level crossings may only be built on these slopes */

   322

			if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {

   323

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   324

			}

   325

#undef M

   326

   327

			if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;

   328

			switch (GetTrackBits(tile)) {

   329

				case TRACK_BIT_X:

   330

					if (pieces & ROAD_X) goto do_clear;

   331

					roaddir = AXIS_Y;

   332

					break;

   333

   334

				case TRACK_BIT_Y:

   335

					if (pieces & ROAD_Y) goto do_clear;

   336

					roaddir = AXIS_X;

   337

					break;

   338

   339

				default: goto do_clear;

   340

			}

   341

   342

			if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   343

   344

			if (flags & DC_EXEC) {

   345

				MakeRoadCrossing(tile, _current_player, GetTileOwner(tile), roaddir, GetRailType(tile), p2);

   346

				MarkTileDirtyByTile(tile);

   347

			}

   348

			return _price.build_road * 2;

   349

		}

   350

   382

		default:

   383

do_clear:;

   384

			ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   385

			if (CmdFailed(ret)) return ret;

   386

			cost += ret;

   387

	}

   388

   389

	ret = CheckRoadSlope(tileh, &pieces, existing);

   390

	/* Return an error if we need to build a foundation (ret != 0) but the

   391

	 * current patch-setting is turned off (or stupid AI@work) */

   392

	if (CmdFailed(ret) || (ret != 0 && (!_patches.build_on_slopes || _is_old_ai_player)))

   393

		return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   394

   395

	cost += ret;

   396

   397

	if (IsTileType(tile, MP_STREET)) {

   398

		// Don't put the pieces that already exist

   399

		pieces &= ComplementRoadBits(existing);

   400

	}

   401

   402

	cost += CountRoadBits(pieces) * _price.build_road;

   403

   404

	if (flags & DC_EXEC) {

   405

		if (IsTileType(tile, MP_STREET)) {

   406

			SetRoadBits(tile, existing | pieces);

   407

		} else {

   408

			MakeRoadNormal(tile, _current_player, pieces, p2);

   409

		}

   410

   411

		MarkTileDirtyByTile(tile);

   412

	}

   413

	return cost;

   414

}

   415

   416

int32 DoConvertStreetRail(TileIndex tile, RailType totype, bool exec)

   417

{

   418

	// not a railroad crossing?

   419

	if (!IsLevelCrossing(tile)) return CMD_ERROR;

   420

   421

	// not owned by me?

   422

	if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR;

   423

   424

	if (GetRailTypeCrossing(tile) == totype) return CMD_ERROR;

   425

   426

	if (exec) {

   427

		SetRailTypeCrossing(tile, totype);

   428

		MarkTileDirtyByTile(tile);

   429

		YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(GetCrossingRailBits(tile)));

   430

	}

   431

   432

	return _price.build_rail >> 1;

   433

}

   434

   435

   436

/** Build a long piece of road.

   437

 * @param end_tile end tile of drag

   438

 * @param p1 start tile of drag

   439

 * @param p2 various bitstuffed elements

   440

 * - p2 = (bit 0) - start tile starts in the 2nd half of tile (p2 & 1)

   441

 * - p2 = (bit 1) - end tile starts in the 2nd half of tile (p2 & 2)

   442

 * - p2 = (bit 2) - direction: 0 = along x-axis, 1 = along y-axis (p2 & 4)

   443

 */

   444

int32 CmdBuildLongRoad(TileIndex end_tile, uint32 flags, uint32 p1, uint32 p2)

   445

{

   446

	TileIndex start_tile, tile;

   447

	int32 cost, ret;

   448

   449

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   450

   451

	if (p1 >= MapSize()) return CMD_ERROR;

   452

   453

	start_tile = p1;

   454

   455

	/* Only drag in X or Y direction dictated by the direction variable */

   456

	if (!HASBIT(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis

   457

	if (HASBIT(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis

   458

   459

	/* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */

   460

	if (start_tile > end_tile || (start_tile == end_tile && HASBIT(p2, 0))) {

   461

		TileIndex t = start_tile;

   462

		start_tile = end_tile;

   463

		end_tile = t;

   464

		p2 ^= IS_INT_INSIDE(p2&3, 1, 3) ? 3 : 0;

   465

	}

   466

   467

	cost = 0;

   468

	tile = start_tile;

   469

	// Start tile is the small number.

   470

	for (;;) {

   471

		RoadBits bits = HASBIT(p2, 2) ? ROAD_Y : ROAD_X;

   472

   473

		if (tile == end_tile && !HASBIT(p2, 1)) bits &= ROAD_NW | ROAD_NE;

   474

		if (tile == start_tile && HASBIT(p2, 0)) bits &= ROAD_SE | ROAD_SW;

   475

   476

		ret = DoCommand(tile, bits, 0, flags, CMD_BUILD_ROAD);

   477

		if (CmdFailed(ret)) {

   478

			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;

   479

			_error_message = INVALID_STRING_ID;

   480

		} else {

   481

			cost += ret;

   482

		}

   483

   484

		if (tile == end_tile) break;

   485

   486

		tile += HASBIT(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);

   487

	}

   488

   489

	return (cost == 0) ? CMD_ERROR : cost;

   490

}

   491